26 lines
1.1 KiB
Python
26 lines
1.1 KiB
Python
#!/usr/bin/env python3
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"""Read the in-app browser / preview pane in the Hermes desktop GUI.
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The preview's content lives in the renderer (a sandboxed ``<webview>``), so this
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round-trips through the gateway's blocking-prompt bridge like ``read_terminal``
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(``preview.read.request`` -> ``preview.read.respond``). Registered as action=read of
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`desktop_preview`; the agent dispatches here with the injected callback.
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"""
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from typing import Callable, Optional
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from tools.read_terminal_tool import read_pane
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def read_preview_tool(
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start: Optional[int] = None, count: Optional[int] = None, callback: Optional[Callable] = None
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) -> str:
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"""Return the active preview tab's contents (+ metadata) as a JSON string."""
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return read_pane(callback, (("start", start, 0), ("count", count, 1)), (
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"read_preview is only available in the Hermes desktop app.",
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"start and count must be integers.",
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"Failed to read the preview pane: ",
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"No preview tab answered: no page is loaded (call open_preview first), "
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"or the bridge timed out. If the pane IS open, the desktop app may be older "
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"than this backend — update it and retry."))
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